Abstract The paper presents a methodology for the calibration of a Karagozian-Case Concrete (KCC) constitutive model for the simulation of dolomite rock. A series of basic experiments are performed under static and dynamic loading conditions, including uniaxial compression tests, triaxial compression tests at different confining pressures, and Brazilian tests for determining indirect tensile strength. A step-by-step procedure for determining the failure surface, the equation of state and damage parameters is proposed. The acquired data are validated using numerical simulations under loading conditions corresponding to those used in the experimental tests. A mesh sensitivity study is briefly discussed. Quantitative and qualitative comparisons of the numerical outcomes and experimental data reveal a good correlation. The KCC model reliably reproduces the rock behavior, including increased strength due to stress triaxiality and kinematic hardening with an increased strain rate. The damage evolution in the material is similar to that recorded by a fast camera during the experiments. The validated model will be used for modeling borehole blasting in further investigations.

中文翻译：

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用于白云岩数值模拟的 Karagozian-Case Concrete 本构模型参数的确定和验证

摘要 本文提出了一种用于校准用于模拟白云岩的 Karagozian-Case Concrete (KCC) 本构模型的方法。在静态和动态加载条件下进行了一系列基础实验，包括单轴压缩试验、不同围压下的三轴压缩试验以及确定间接拉伸强度的巴西试验。提出了确定破坏面、状态方程和损伤参数的逐步程序。获得的数据在对应于实验测试中使用的负载条件下使用数值模拟进行验证。简要讨论了网格敏感性研究。数值结果和实验数据的定量和定性比较揭示了良好的相关性。KCC 模型可靠地再现了岩石行为，包括由于应力三轴性和运动硬化导致的强度增加以及应变速率增加。材料中的损伤演变与实验期间快速相机记录的相似。经验证的模型将用于模拟钻孔爆破在进一步调查中。